<div class="uml">
  <ul class="mbt">
    <% participations.each do |participation| -%>
    <li class="mbtl"><%= avatar_for participation.user, "large" %></li>
    <li class="mbtrdot"><%= link_to participation.user.login, user_path(participation.user.id) %> 要参加 <%= link_to participation.event.title, event_path(participation.event) %></li>
    <% end -%>
  </ul>
</div>